tree fabf33cbc778cd7451681c87547d62759f3221e8
parent 40f7491e8a4a5cf7ab1d17f7679d94938ca4a714
author Javi Fontan <jfontan@gmail.com> 1550160507 +0100
committer Javi Fontan <jfontan@gmail.com> 1550160507 +0100

memfs: return error when using negative offsets

same error as in go library:

https://github.com/golang/go/commit/a5999b7b81b9dc875cc635e1b089d768ddd41a8c

Signed-off-by: Javi Fontan <jfontan@gmail.com>